import os

def rename_files():
    current_dir = os.getcwd()
    print(current_dir)
    file_list = os.listdir("./CS/Python/ud036/prank")
    print(file_list)
    os.chdir("./CS/Python/ud036/prank")
    trans = str.maketrans('','','0123456789')
    for file_name in file_list:
        os.rename(file_name,file_name.translate(trans))
    os.chdir(current_dir)
rename_files()